Gassimou Bangoura1, Lian-Yue Yang, Gen-Wen Huang, Wei Wang. 1. Department of General Surgery and Liver Cancer Laboratory, Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, China.
Abstract
AIM: To investigate the expression of hypoxia-inducible factor (HIF)-2alpha/endothelial PAS domain protein1 (EPAS1) in hepatocellular carcinoma (HCC). METHODS: Expression of HIF-2alpha/EPAS1 was investigated immunohistochemically on paraffin-embedded sections from 97 patients with HCC. To further confirm that HIF-2alpha/EPAS1 in HCC tissues also correlated with angiogenesis, a parallel immunohistchemistry study of vascular endothelial growth factor (VEGF) was performed on these 97 cases. RESULTS: HIF-2alpha/EPAS1 could be detected in 50 of 97 cases (51.6%), including 19 weakly positive (19.8%), and 31 strongly positive (31.1%), the other 47 cases were negative (48.4%). The expression of HIF-2alpha/EPAS1was significantly correlated with tumor size, capsule infiltration, portal vein invasion, and necrosis. A parallel immunohistochemical analysis of VEGF demonstrated its positive correlation with capsule infiltration, portal vein invasion, and HIF-2alpha/EPAS1 overexpression, which supported the correlation of HIF-2alpha/EPAS1up-regulation with tumor angiogenesis. No apparent correlation was observed between HIF-2alpha/EPAS1 and capsular formation, presence of cirrhosis, and histological grade. CONCLUSION: HIF-2alpha/EPAS1 is expressed in most of HCC with capsular infiltration and portal vein invasion, which indicates a possible role of HIF-2alpha/EPAS1 in HCC metastasis.
AIM: To investigate the expression of hypoxia-inducible factor (HIF)-2alpha/endothelial PAS domain protein1 (EPAS1) in hepatocellular carcinoma (HCC). METHODS: Expression of HIF-2alpha/EPAS1 was investigated immunohistochemically on paraffin-embedded sections from 97 patients with HCC. To further confirm that HIF-2alpha/EPAS1 in HCC tissues also correlated with angiogenesis, a parallel immunohistchemistry study of vascular endothelial growth factor (VEGF) was performed on these 97 cases. RESULTS:HIF-2alpha/EPAS1 could be detected in 50 of 97 cases (51.6%), including 19 weakly positive (19.8%), and 31 strongly positive (31.1%), the other 47 cases were negative (48.4%). The expression of HIF-2alpha/EPAS1was significantly correlated with tumor size, capsule infiltration, portal vein invasion, and necrosis. A parallel immunohistochemical analysis of VEGF demonstrated its positive correlation with capsule infiltration, portal vein invasion, and HIF-2alpha/EPAS1 overexpression, which supported the correlation of HIF-2alpha/EPAS1up-regulation with tumor angiogenesis. No apparent correlation was observed between HIF-2alpha/EPAS1 and capsular formation, presence of cirrhosis, and histological grade. CONCLUSION:HIF-2alpha/EPAS1 is expressed in most of HCC with capsular infiltration and portal vein invasion, which indicates a possible role of HIF-2alpha/EPAS1 in HCC metastasis.
Authors: M S Wiesener; H Turley; W E Allen; C Willam; K U Eckardt; K L Talks; S M Wood; K C Gatter; A L Harris; C W Pugh; P J Ratcliffe; P H Maxwell Journal: Blood Date: 1998-10-01 Impact factor: 22.113
Authors: A Giatromanolaki; M I Koukourakis; E Sivridis; H Turley; K Talks; F Pezzella; K C Gatter; A L Harris Journal: Br J Cancer Date: 2001-09-14 Impact factor: 7.640